Pd(II)-Catalyzed Direct γ-C(sp<sup>3</sup>)-H Arylation between Free β<sup>2</sup>-Amino Esters and β<sup>3</sup>-Amino Esters and Aryl Iodides Using a Catalytic Transient Directing Group
作者:Zhaohui Wang、Yangjie Fu、Qiyu Zhang、Hong Liu、Jiang Wang
DOI:10.1021/acs.joc.0c00115
日期:2020.6.19
Pd(II)-catalyzed direct γ-C(sp3)-H arylation coupling with free β2-amino esters and β3-amino esters using a commercially available catalytic transientdirectinggroup has been developed. This approach features high efficiency, broad substrate tolerance, easily accessible starting materials, and mild reaction conditions.
A Mild and General One-Pot Synthesis of Densely Functionalized Diaryliodonium Salts
作者:Linlin Qin、Bao Hu、Kiel D. Neumann、Ethan J. Linstad、Katelyenn McCauley、Jordan Veness、Jayson J. Kempinger、Stephen G. DiMagno
DOI:10.1002/ejoc.201500986
日期:2015.9
Diaryliodoniumsalts are powerful and widely used arylating agents in organic chemistry. Here we report a scalable, synthesis of densely functionalized diaryliodoniumsaltsfrom aryl iodides under mild conditions. This two-step, one-pot process has remarkable functional group tolerance, is compatible with commonly employed acid-labile protective group strategies, avoids heavy metal and transition metal
二芳基碘鎓盐是有机化学中强大且广泛使用的芳基化剂。在这里,我们报告了在温和条件下从芳基碘化物大规模合成密集官能化二芳基碘鎓盐的方法。这种两步一锅法具有显着的官能团耐受性,与常用的酸不稳定保护基策略兼容,避免重金属和过渡金属试剂,并为 PET 成像剂的稳定前体提供了直接途径。
AlCl<sub>3</sub>
-Catalyzed Intermolecular Annulation of Thiol Derivatives and Alkynes by 1,2-Sulfur Migration: Construction of 6-Substituted Benzo[<i>b</i>
]thiophenes
作者:E. Ramesh、Tirumaleswararao Guntreddi、Akhila K. Sahoo
DOI:10.1002/ejoc.201700607
日期:2017.8.17
intermolecular oxidative annulation of N-arylthio phthalimide derivatives with alkynes is showcased at room temperature. The annulation involves oxidative cleavage of the SN bond and the occurrence of 1,2-S-migration, which eventually allows the construction of diverse arrays of -conjugated 6-substituted 2,3-diaryl benzo[b]thiophenederivatives.
Palladium-Catalyzed Synthesis of β,β-Diaryl α,β-Unsaturated Ketones
作者:Li-ming Shao、Yi-lin Zheng、Li Xiao、Qiong Xie
DOI:10.1055/s-0037-1611354
日期:2019.3
Abstract We herein describe a versatile palladium-catalyzed synthesis of β,β-diaryl α,β-unsaturatedketones. A broad range of aryl halides react with β-arylbutanones to afford biologically useful, symmetrical and unsymmetrical ketones. The use of 4,5-diazafluoren-9-one and oxygen makes this one-pot reaction more applicable. A plausible mechanism involving palladium-catalyzed oxidative Heck-type cross-coupling